COOLING SYSTEM -680640217

5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

COOLING SYSTEM

15. LOSS OF ENGINE COOLANT.

Perform cooling system test (page 4-89).

16. ENGINE OVERHEATS.

Step 1. Check for low coolant level in radiator expansion tank.

If coolant level in radiator expansion tank is low, add coolant

as required (TM 5-2420-224-10).

If coolant level in radiator expansion tank is not low, go to

step 2.

Step 2. Check for leaking and damaged coolant hoses.

If coolant hoses are leaking or damaged, tighten loose

connections or replace coolant hoses (page 4-98).

If coolant hoses are not leaking or damaged, go to step 3.

Step 3. Check for loose, worn, and missing fan belt.

If fan belt is loose, worn, or missing, adjust or replace fan belt

(page 4-106).

If fan belt is not loose, worn, or missing, go to step 4.

Step 4. Check for clogged radiator cooling core by draining coolant from radiator.

If coolant drains properly, replace coolant thermostat

(page 4-100).

If coolant does not drain properly, replace radiator (page 4-92).